












💦 Stay hydrated, stay unstoppable—filter your way to adventure!
The HydraPak 42mm Filter Cap is a lightweight, high-flow water filtration accessory designed for outdoor enthusiasts. It filters up to 1,500 liters of water at over 1 liter per minute, removing 99.9999% of bacteria, parasitic cysts, and microplastics per EPA and NSF standards. Compatible with all 42mm HydraPak bottles, it features a one-handed, easy-to-use nozzle with a protective dust cover, making it ideal for hiking, endurance sports, camping, and emergency preparedness.























| ASIN | B0BRBQRQ7N |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 107,612 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 118 in Camping Water Filters |
| Colour | Blue |
| Customer Reviews | 4.6 4.6 out of 5 stars (270) |
| Date First Available | 6 Mar. 2023 |
| Flow rate | 1 Litres Per Minute |
| Included components | 42mm Filter Cap |
| Installation method | Direct Attachment |
| Item Package Quantity | 1 |
| Item Weight | 4 g |
| Item model number | F03 |
| Manufacturer | HydraPak |
| Material | PP/POM, EPDM, Silicone, Hollow Fiber |
| Part number | HYF03N |
| Power source type | Non electric |
| Product Dimensions | 4.19 x 4.19 x 12.95 cm; 4 g |
| Size | 42 mm |
| Special Features | NSF certified |
| Style | Potable Water Filter |
K**R
Cool filter
Brilliant filter, recommend buying with the seeker for best result
A**R
Got sick
Took this to Bhutan to try and be eco conscious and not buy bottled water. Got the squits day two and spent two days in bed. Apparently you need to boil the water. Not sure if that reflects badly on the filter, or me. Anyway. Sceptical about its usability now after purging every ounce of water through various orifices.
E**N
Industry standard, but dear.
I've not had to use it but it fits the top of bottles. I feel that they are expensive for what they are.
A**R
Great filter. Used for 20+ days in the backcountry this year. Filtering mostly clean creek water most of the time. Flow rate is excellent. Would recommend.
C**N
S'adapte parfaitement à ma flasque Salomon 42mm nickel
J**.
This filter has made the hydrapak 2L flexible bottle even more versatile on our multi day hikes.
A**R
Es un filtro muy bueno y aunque no tiene tanto caudal como el katadyn befree cumple igual de bien. Además me gusta más este por su tapón (motivo por el que prefiero este al katadyn). Nunca se te va a abrir por accidente, no entra suciedad y se ve muy resistente. Yo he estado bebiendo de un charco en una pista forestal durante un día con esto y no he tenido ningún problema Combinado con la botella hydrapak flux tienes un equipo de filtración perfecto. No tienes que mojarte la mano pues tiene un asa para coger agua de donde sea. Como es medianamente rígida se aguanta de pie y es super duradero. Lo único malo es el sabor a plástico que tienen todas las cosas de plástico flexible como camelbaks y demas... Recomiendo darle unos cuantos lavados con bicarbonato, se reduce mucho el sabor aunque nunca desaparece. 10/10
M**)
こちらのHydrapakの42mm FILTER CAPは、 mont-bellの2024年版Flex Water Pack(旧版ではない)とシンデレラフィットです。 これで野営しても沢から水を汲んで浄水して飲めます。 また、セット後はmont-bellのパックと本品のキャップがグレー同士で色合いがいい。 スイスのフィルターキャップは青の意匠面が出るので野営には「ん?」となるので、 こちらの組み合わせの方がおすすめです。
Trustpilot
3 days ago
2 weeks ago